You are standing at a courthouse step about to bid on a house you have never been inside, that you cannot inspect, that comes with no warranty of any kind, and that has somebody living in it whose name you do not know.
Every one of those is manageable. The one investors underprice is the last, because they assume a foreclosure sale hands them an empty house and it does not.
Who Is Inside Changes Everything
Three possibilities, three completely different timelines.
The former owner. The most common. They have no ongoing right to possession after the sale, and they still cannot be removed without a court process, which is a post-foreclosure eviction or ejectment depending on the state. Timelines range from a few weeks to several months, and a former owner who feels wronged by the whole process is often a contested case.
A bona fide tenant. Federal law protects tenants at foreclosure, and this is the piece most investors do not know. A genuine tenant under an arm's-length lease predating the foreclosure generally gets to remain through the balance of the lease term, and where the tenancy is month-to-month, or where the buyer intends to occupy the property as a primary residence, they are generally entitled to at least ninety days' written notice. State and local law can be more protective still, and several jurisdictions are.
So a tenant with eight months left on a real lease may have eight months left, and you bought an occupied rental rather than a house to flip.
Someone with no clear status. A relative, an occupant under a lease that may not be arm's length, or a person with no documented right to be there. This is the ambiguous case and it is the slowest, since establishing which category applies is itself a proceeding, and the framework is in squatters and unauthorized occupants.
The Tenant Protection Deserves Its Own Attention
Because it is the specific thing that turns an expected sixty-day possession into a year.
The protection applies to bona fide tenancies, which broadly means a real arm's-length lease at a rent that is not substantially below market, entered by someone who is not the borrower or their immediate family. That definition exists to prevent a borrower manufacturing a lease to a relative on the eve of a sale, and servicers and courts do look at it.
What it means in practice is that you inherit the lease. Rent is payable to you from the sale date, on the existing terms, and you cannot simply raise it or terminate it because the ownership changed.
Two practical consequences. First, find out before you bid whether the occupant is a tenant, which is difficult without access and is exactly why the pre-bid research below matters. Second, if the answer is yes, underwrite the property as a rental for the remaining term rather than as a flip.
Where local ordinances add just-cause protections or relocation payments on top, the position tightens further, per compliance for real estate investors.
What to Establish Before You Bid
You cannot inspect, and there is still a considerable amount you can find out.
Which lien is foreclosing. The single most important question. A senior lienholder foreclosing generally extinguishes junior liens; a junior foreclosing leaves the senior mortgage in place, and buyers have paid real money for a property that came with a first mortgage they did not notice.
What survives regardless. Property taxes, many municipal liens, and certain assessments commonly survive a foreclosure sale. Get a title search rather than assuming the sale clears everything.
Whether a redemption period applies. Several states allow the former owner to redeem the property for a period after the sale, which means you may hold something that can be taken back. Know the rule and the period before you bid, because it changes what you can safely do to the property in the interim.
Who is inside. Drive it, look for occupancy, talk to neighbors, check whether the address appears in any recent rental listing, and look for eviction filings against the address, which are public and tell you a great deal. Where a sale was started years ago and never completed, that is the situation in zombie foreclosures. The foreclosure framework generally is set out in foreclosure purchase laws for investors.
Budget the Possession as a Line Item
The bid is not the cost. The cost is the bid plus everything between the bid and control of the building.
Legal fees for the removal process, which vary with whether it is contested. The removal timeline itself, during which you own a non-producing asset and are carrying it, per holding costs investors forget. A cash-for-keys allowance, which is nearly always the cheaper route and should be budgeted rather than treated as a defeat. Then the condition on exit, which is unknown and rarely better than you hoped.
Add the surviving liens and the taxes. Add a full repair contingency, because you are buying without an inspection and the estimating problem is the extreme version of rehab estimating without walking the property.
Then bid the remainder. Investors who lose money at auction almost never lose it on the hammer price; they lose it on the four categories above, each of which they treated as a small number.
The Money Mechanics
Auction terms are unforgiving in a way that catches first-time bidders, and they vary by state and by whether the sale is judicial or run by a trustee.
Expect a deposit due immediately, usually in certified funds and sometimes a fixed sum rather than a percentage. Expect the balance on a short deadline, commonly measured in days rather than weeks, with forfeiture of the deposit if you miss it. That timeline rules out conventional financing entirely and rules out most hard money unless the relationship and the approval are already in place before you bid.
Confirm what form of funds is accepted and what the settlement mechanics are, because a bidder who wins and then cannot perform loses the deposit and sometimes faces liability for a resale shortfall.
Understand also that the opening bid is usually set by the foreclosing party at or near the debt, and a property worth less than the debt will simply revert to the lender with no sale. Knowing the likely opening figure before you attend saves a morning.
And confirm what document you receive and when it records, since your ability to take any action at the property depends on holding title rather than on having won.
How to Approach the Occupant
You will be knocking on a door to introduce yourself to someone who has just lost their home, or who has just learned their landlord did.
Do it in person, early, and without a demand. Explain who you are and that you now own the property. Ask what their situation is, and listen to the answer, because it determines which of the three categories above you are in.
Lead with the cash-for-keys offer rather than the notice. It is faster, it costs less than the legal route, and it produces a property returned in better condition. Put it in writing, condition payment on surrender, and pay at handover.
Where they are a tenant, say so plainly and tell them the protection exists. You will get the rent, you will get cooperation, and you will avoid the version where they learn about their rights from a legal aid attorney in month two.
Do not use self-help, do not cut utilities, and do not send anyone to apply pressure. Beyond being illegal in most states, it converts a manageable timeline into litigation.
Back to the Courthouse Step
Return to where this started, because the discipline fits in one paragraph.
Before the auctioneer gets to your parcel you should already know which lien is foreclosing, what survives the sale, whether a redemption period applies, whether anyone is inside, and roughly which category they fall into. You should have a number that includes the legal cost, the holding cost, a cash-for-keys allowance and a repair contingency, and you should have decided your walk-away figure while sitting somewhere calm rather than while bidding.
Auction discipline is almost entirely preparation, because the event itself offers none. Everything is final, nothing is warranted, and the only protection available is the work you did the week before, which is the argument in when to walk away from a deal.
Auction is one acquisition channel among the many in the guide to motivated seller niches, and the related route through tax liens is covered in tax deed and tax lien auctions.